486 Mr. Blackwall on undescribed Species of Araneide. 
the maxillz and lip, are of a brownish black colour. The anterior and 
posterior pairs of legs, which are the longest, are equal in length, and the 
third pair is the shortest. Each tarsus is terminated by three claws; the 
two superior ones are slightly pectinated, and the inferior one is inflected 
near its base. The tibize of the anterior pair of legs are disproporticnally 
strong, having the appearance of being swoln. The palpi are slender ; the 
third joint is long and clavate; the fourth is elongated before into a nar- 
row, oval process, hairy externally, which extends obliquely across the 
upper part of the fifth joint towards the inner side, but is terminated by a 
short, acute spine curved outwards: the fifth joint is oval, convex and 
hairy externally, concave within, comprising the palpal organs, which are 
highly developed and complicated in structure, having several corneous 
processes, one of which, on the outer side, at the extremity, is curved 
into a cireular form. Abdomen oval, convex above, projecting over the 
base of the cephalothorax ; it is thinly covered with hair, glossy, and of a 
brownish black colour. The plates of the spiracles are pale yellow. 
Length, from the anterior part of the cephalothorax to the extremity of 
the abdomen, ~-th of an inch; length of the cephalothorax »,; breadth 
5; breadth of the abdomen ;!,; length of an anterior leg +; length of a 
jeg of the third pair 3. 
{In March 1835 I captured a few specimens of this species, all of which 
were males, under stones, at Oakland. 
Neriene livida. 
Cephalothorax oval, convex, glossy, with several furrows on the sides 
diverging from the middle to the margins, and an indentation in the medial 
line of the posterior region. Mandibles powerful, conical, convex in front, 
near the base, armed with a few small teeth on the inner surface, and 
rather inclined towards the pectus, which is heart-shaped. Maxillz strong, 
convex underneath, and inclined towards the lip, which is somewhat of a 
triangular form truncated at the apex. Legs and palpi robust, and fur- 
nished with hairs and fine spines. These parts are of a red-brown colour, 
the lip, maxilla, mandibles, and anterior part of the cephalothorax being 
the darkest. Each tarsus is terminated by three claws; the two superior 
ones are curved and deeply pectinated, and the inferior one is inflected 
near its base; the palpi have a curved, pectinated claw at the extremity. 
Abdomen oval, convex above, projecting over the base of the cephalotho- 
rax, and rather broader at the posterior than the anterior extremity ; it 
is thinly covered with hair, glossy, and of a yellowish-brown colour, with 
a tinge of black. Plates of the spiracles pale-yellow. ; 
Length, from the anterior part of the cephalothorax to the extremity of 
the abdomen, ith of an inch; length of the cephalothorax 5',; breadth 
~'y; breadth of the abdomen yz; length of an anterior leg +; length of 
a leg of the third pair +. 
The male is smaller and darker coloured than the female, but the rela- 
tive length of its legs is the same. The second joint of the palpi is curved 
towards the cephalothorax; the third and fourth joints are short, the 
latter projecting two obtuse apophyses, the larger one situated on the 
outer and the smaller one on the inner side: the fifth joint is oval, convex 
and hairy externally, concave within, comprising the palpal organs, which 
are highly developed, complex in structure, and of a dark red-brown colour. 
This species is common on the under surface of stones in the neighbour- 
hood of Llanrwst. 
Neriene furva. 
The cephalothorax is of an oval figure; it is convex, glossy, with slight 
furrows on the sides, and an indentation in the medial line of the posterior 
